The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2015
Filed:
Oct. 04, 2010
Massimo Fontana, Chicago, IL (US);
Massimo Fontana, Chicago, IL (US);
International Engine Intellectual Property Company, LLC, Lisle, IL (US);
Abstract
A method of determining a malfunction in a hydrocarbon injection system for an internal combustion engine having an exhaust system with a diesel particulate filter and a diesel oxidation catalyst, is provided. An efficiency of a diesel oxidation catalyst to convert hydrocarbons injected for regeneration of a diesel particulate filter into heat is estimated based upon an input temperature of the diesel oxidation catalyst, an output temperature of the diesel oxidation catalyst, and an output temperature of a diesel particulate filter. The estimated efficiency is compared to a predetermined stored efficiency value. An indication of a malfunction is generated when the comparison of the estimated efficiency to the predetermined stored efficiency exceeds a threshold amount.